Simply invert your value structure, find a path, forward or backward, that makes the light either lit or dark depending on your position to the frame. fully dependent on your eyes, the lights brightness and the surroundings. natural light = natural traffic. think on it.

>>7779418
fuck off cris

>>7779534
Show diagram.
>invert
>natural traffic
how is traffic calculated then

>>7779418
>How to plan realistic values in a painting?
Use perspective, search "how to draw shadows in perspective" and you'll find the explanation, it relies on light angle and light direction, coming from a light source which can be found either in or outside of the picture plane and will be used as guide to cast shadows in your objects. After that, you use the typical value grouping that everyone talks about when showing spheres, that is matter of taste as long as you respect the value groups (even if you omit certain values like reflected light or paint with flats).
Try trust your perspective channel, he has videos on the matter.

>>7781686
...Ok what about refraction and translucency. glass basically. That's the focus of the question actually.

Unix filename so not your image but hey I recognize that desk and that collection of nippers.
That guy is one of the best plastic modellers of teh 4chinz

>>7779418
I recognize the mentally ill chat
This is your thread right?
>>7778946